Until around 1966, Saladino was the second banana letterer at DC, the first being Ira Schnapp. Schnapp was a gifted calligrapher and designer who was responsible for most of the cover lettering, logo design and house advertising there for years. In '66 when artist Carmine Infantino was brought into management (eventually becoming publisher), he attempted to modernize the look of DC by replacing Schnapp with Saladino. Thereafter, Gaspar did most of the cover lettering, logo design and house advertising. Schnapp left the company in 1968.

Gaspar designed hundreds of logos for the company and as time permitted, worked on the insides. When Swamp Thing by Len Wein and Bernie Wrightson became both a financial and creative success for DC in the seventies, everyone agreed the comic wouldn't be the same without Gaspar's distinctive and expressive lettering. When he had to miss an issue, the point was proven. He also occasionally worked for Marvel, often under the name "L.P. Gregory" or merely "Gaspar," and was called upon most times when MAD needed someone to do fancy lettering.

Many comic book letterers, including frequent award-winner Todd Klein, cite Saladino as an inspiration or even mentor. He truly was an artist himself, able to craft sound effects and display lettering that were as good as any artwork over which they appeared. His basic balloon lettering was clear and organic and more than a few artists were known to ask, "Can you get Gaspar to letter my work?" He was also super-reliable, putting in long hours at the drawing board when necessary to meet deadlines.